Article
Automation & Control Systems
Chengkai Liu, Fujin Deng, Qian Heng, Xu Cai, Rongwu Zhu, Marco Liserre
Summary: The study proposes a CTB-based HMMC for protecting HVdc systems under dc line short-circuit faults, with current interruption capability.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Ramin Razani, Yasser Abdel-Rady I. Mohamed
Summary: This article proposes a tailored fault-tolerant operation strategy for the dc/dc modular multilevel converter (MMC) in the case of submodules (SMs) faults. The strategy utilizes the unique characteristics of the dc/dc MMC to enable post-fault operation without redundant SMs. The effectiveness of the strategy is confirmed through simulation studies in MATLAB\Simulink environment.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Ke Jia, Qijuan Zhao, Zhengxuan Zhu, Tianshu Bi
Summary: This article analyzes the high-frequency characteristics of faults in multi-converter DC systems and obtains the frequency domain impedance model of converters based on transient fault circuit analysis method. The model established in the higher frequency band provides a stable impedance value unaffected by control strategy, laying a theoretical foundation for the protection principle. Additionally, the characteristics of high-frequency impedance superposition in multi-converter systems are given, which provides a basis for system-level protection setting and coordination.
IEEE TRANSACTIONS ON SMART GRID
(2021)
Article
Engineering, Electrical & Electronic
Govind Avinash Reddy, Anshuman Shukla
Summary: In this article, a new enhanced modular multilevel converter (EMMC) is introduced, which addresses the drawbacks of the conventional modular multilevel converters (MMC). The EMMC, based on a new submodule (SM) structure, is fully modular and requires fewer switches and capacitors. It possesses the features of reduced energy-storage requirement and dc fault-tolerant capability.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Philippe A. Gray, Peter W. Lehn, Netan Yakop
Summary: This article proposes a novel modular multilevel dc-dc converter with high power-density potential. It combines the advantages of modular multilevel converter (MMC) and flying capacitor converter. The converter features a new current source submodule (CSM) stage that reduces the string current and allows common grounding of the input source and output load. The article introduces the operating principles and the control design, and the laboratory-scale prototype achieves a peak efficiency of 97.1%.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Energy & Fuels
Peng Wang, Maren Kuschke, Kai Strunz
Summary: An analytical model for the half-bridge submodule based modular multilevel converter (MMC) under pole-to-pole fault is formulated, implemented, and validated. The different stages of events after a fault occurrence are categorized, and equivalent circuits are derived for analysis. The analytical expressions of fault currents provide insights for parameter design and circuit breaker selection.
IEEE TRANSACTIONS ON ENERGY CONVERSION
(2022)
Article
Automation & Control Systems
Chetan Srivastava, Manoj Tripathy
Summary: The dc microgrid is proposed as a proficient solution for evolving dc loads and their applications. The conventional protection schemes fail to meet the requirements of sensitivity and selectivity. A differential scheme with an advanced communication framework is proposed to overcome the limitations. An adaptive statistical fano factor tool-based scheme for fault detection and classification is presented, which is fast, effective, and immune to system disturbances.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Engineering, Electrical & Electronic
Dimitrios Vozikis, Grain P. Adam, Pierre Rault, Olivier Despouys, Derrick Holliday
Summary: This article discusses the operating principles, performance, and variant design of the enhanced modular multilevel converter (EMMC). Through comprehensive simulation studies, it has been confirmed that EMMC is reliable in normal operation, fault tolerance, and specific functionalities.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Hanyu Wang, Xuejun Pei, Yuhuan Wu, Yong Kang
Summary: This article proposes a fault-tolerant method for switch faults in modular series-parallel dc-dc converters, which includes fast fault diagnosis and postfault reconfiguration. By adding a small auxiliary winding to each module, fast fault diagnosis is achieved without expensive sensors. A general low-cost hardware circuit is designed to locate faulty modules quickly, and a systematic reconfiguration process is presented for different structures, ensuring smooth hot swap with minimized impact on output and other healthy modules.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Computer Science, Information Systems
G. Kesava Rao, Premalata Jena
Summary: The evaluation of the line parameter-based fault detection technique is an attractive option to overcome limitations of conventional protection schemes during high resistance fault situations. The proposed method focuses on estimating resistance to accurately detect faults in radial and ring configuration dc microgrids. Simulation and experimental results validate the effectiveness of the technique in detecting faults accurately.
IEEE SYSTEMS JOURNAL
(2022)
Article
Automation & Control Systems
D. P. S. Gomes, C. Ozansoy
Summary: This paper provides a historical narrative of the progress and developments in the field of high-impedance faults in power distribution systems. It covers seminal papers to contemporary methods and technology, along with quantitative figures on survey methods and knowledge gaps. The comprehensive review serves as a valuable reference for researchers in the field.
Article
Engineering, Multidisciplinary
Jose M. Guerrero, Gustavo Navarro, Kumar Mahtani, Carlos A. Platero
Summary: This article presents a new ground fault location method for the controlled ac drive side of a dc-ac system. It is based on measuring the voltage of a grounding resistor placed at the midpoint of the dc bus and comparing it with the phase-neutral voltages of the ac drive side. The method detects the faulty phase through angle comparison and provides an estimation of the fault location. Simulation and experimental tests confirm its effectiveness.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Cristian Pineda, Javier Pereda, Felix Rojas, Gabriel Droguett, Claudio Burgos-Mellado, Alan J. Watson
Summary: This study introduces a novel zero-current switching modulation technique for high-step-ratio MMC DC-DC converters, which generates trapezoidal or triangular current by minimizing the root-mean-square current to operate the converter over a wide range of output voltage and power. The proposed optimization uses a simple control scheme to regulate output voltage and voltage balance among the floating cell capacitors, and has been validated through theoretical analysis and a laboratory-scaled prototype, demonstrating effectiveness and excellent dynamical response.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Jie-Ping Wu, Mou-Fa Guo
Summary: DC grids are in demand for their flexibility, simplicity, efficiency, and capacity, but fault protection is a major challenge. The proposed multiterminal active resonance circuit breaker offers solutions to handle DC faults effectively with various advantages.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Engineering, Electrical & Electronic
Saleh Farzamkia, Hossein Iman-Eini, Arash Khoshkbar-Sadigh, Masoud Noushak
Summary: The article proposes a software-based method to enhance the fault-tolerant capability of modular multilevel converters (MMCs) by controlling the DC bus voltage. The method maintains larger line-to-line voltage in various fault states and balances the line-to-neutral voltages of the MMC in the postfault condition. Additionally, it addresses common-mode voltage, power-factor limitations, and electromagnetic interference issues seen in previous works.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Sudi Xu, Hao Liu, Tianshu Bi
Summary: This study proposes a general design method for phasor estimation algorithms based on complex finite impulse response (FIR) bandpass filters, utilizing mathematical error models to reduce the trial and error process in design. By establishing filter design criteria, the passband and stopband gain range of complex bandpass filters can be determined, allowing for accurate measurements in different scenarios with the designed algorithms.
IEEE TRANSACTIONS ON SMART GRID
(2021)
Article
Engineering, Electrical & Electronic
Ke Jia, Qian Liu, Bin Yang, Liming Zheng, Yu Fang, Tianshu Bi
Summary: This study proposes a fault transient analysis model considering the nonlinear effect of controller saturation for inverter-interfaced renewable energy sources (IIRESs). The model accurately reveals the transient transition of the fault current and exhibits high applicability in different fault scenarios.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Automation & Control Systems
Ke Jia, Zhiming Shi, Congbo Wang, Juntao Li, Tianshu Bi
Summary: Due to the complex structure of flexible dc distribution systems with distributed photovoltaic power, the existing protection methods are not effective. This paper proposes a fault detection and location method based on active converter injection, which utilizes coordinated control between local protection and converters. The method can accurately locate the faulted area by selecting appropriate injected harmonic frequency.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Automation & Control Systems
Liming Zheng, Ke Jia, Wenqiang Wu, Qian Liu, Tianshu Bi, Qixun Yang
Summary: This article explores a novel pilot protection solution based on cosine similarity, which is applied in large-scale wind farms. Compared to traditional protection methods, this new approach improves relay performance, and the protection devices have been put into operation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Ke Jia, Zhiming Shi, Wenqiang Wu, Jinfeng Chen, Tianshu Bi
Summary: This study proposes a protection method based on incipient fault identification to quickly recognize and isolate faults in a PV DC integration system, preventing further development of the faults.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Engineering, Electrical & Electronic
Ke Jia, Laiyun Hou, Qian Liu, Yu Fang, Liming Zheng, Tianshu Bi
Summary: This study proposes a calculation method for transient current based on the phase plane analysis, taking into consideration the saturation characteristics of the nonlinear current loop. It addresses the difficulty in analyzing transient current in inverter-interfaced renewable energy source control systems.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Liming Zheng, Ke Jia, Bin Yang, Tianshu Bi, Qixun Yang
Summary: This article discusses the application of modular multilevel converter-based high voltage direct current transmission technology in large-capacity offshore wind farms and proposes a novel protection method based on singular value decomposition. The experimental results demonstrate that the proposed protection method has excellent performance in various fault scenarios.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Engineering, Electrical & Electronic
Karol Niewiadomski, Robert Smolenski, Piotr Lezynski, Jacek Bojarski, David W. P. Thomas, Frede Blaabjerg
Summary: This article compares the influence of deterministic and random modulation on the error rate in serial communication systems. The results show that there is no significant difference between random and deterministic modulation in terms of error rate probability in serial communication systems, within a certain range of switching frequencies.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Bin Yang, Ke Jia, Qian Liu, Liming Zheng, Tianshu Bi
Summary: This paper proposes a faulted line-section location method using sparse meters for distribution networks with high penetration of inverter interfaced distributed generations (IIDGs). By modeling IIDGs as equivalent impedances, the fault component model can be simplified and the Bayesian Compressed Sensing algorithm is applied for fault current sparse solution and location. The proposed method reduces the required meters for monitoring IIDGs and improves the location success rate by 55% compared to existing methods.
IEEE TRANSACTIONS ON SMART GRID
(2023)
Article
Automation & Control Systems
Qian Liu, Ke Jia, Bin Yang, Liming Zheng, Tianshu Bi
Summary: This article proposes a Laplace domain fault modeling method to investigate fault characteristics of grid-following inverter-interfaced renewable energy sources (IIRESs) employing decoupled sequence control (DSC). A detailed fault model of IIRESs with DSC is established, taking into account the high-order and coupling features of commonly used positive and negative sequence components calculation (PNSCC) modes. The model can explore the contributing factors of the IIRES's fault response within different fault phases.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Energy & Fuels
Seda Ustun Ercan, Angel Pena-Quintal, Dave Thomas
Summary: This paper examines interference in Power Line Communication (PLC), a wired communication technology that utilizes existing electrical networks for communication and data transmission. The study focuses on the effects of spread spectrum methods in reducing Electromagnetic Interference (EMI) from power converters on PLC systems. The results provide insights into the interference produced by a specific DC-DC converter and suggest the need for standardized assessment approaches.
Article
Engineering, Electrical & Electronic
Angel Pena-Quintal, Waseem El Sayed, Mark Sumner, Seda Ustun Ercan, Steve Greedy, Dave Thomas, Robert Smolenski
Summary: This article discusses the effects on nearby communication systems when spread spectrum modulation techniques are used for a dc-dc power converter. Spread spectrum modulation, widely used to comply with electromagnetic compatibility standards, can create harmful effects on the converter or the rest of the power network. Measurements are made to standardize an assessment procedure and evaluate the interference created by an SiC-based dc-dc converter in both frequency domain and serial communication disruption.
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
(2023)
Article
Green & Sustainable Science & Technology
Ke Jia, Xuezheng Dong, Zhiwen Wen, Wenqiang Wu, Tianshu Bi
Summary: A coordinated control method based on the injection of harmonics is proposed to achieve fault ride-through ability for offshore wind farms connected to the grid via MMC-HVDC. The method enables wind power converters to cooperatively limit power injected into the grid without additional communication. The effectiveness of the proposed method is verified through real-time digital simulator and hardware-in-loop dynamic simulation experiments.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2023)
Article
Engineering, Electrical & Electronic
Tetiana Serdiuk, Kseniia Serdiuk, Volodymyr Profatylov, Hafte Hayelom Adhena, David Thomas, Steve Greedy
Summary: This study compares the traction power system and electromagnetic interference (EMI) in the return traction current on the railways of Ukraine, Europe, and the U.K. Experimental evaluation of the spectral compositions of the return traction current was conducted, and the influence of EMI on railway automatics was analyzed.
IEEE LETTERS ON ELECTROMAGNETIC COMPATIBILITY PRACTICE AND APPLICATIONS
(2023)
Article
Computer Science, Information Systems
Tito Yuwono, Mohd Hafiz Baharuddin, Norbahiah Misran, Mahamod Ismail, David W. P. Thomas, Christopher Smartt, Hristo Zhivomirov
Summary: In this paper, three approaches for automatic segmentation of nonstationary EM emission signals are proposed. Test results show that the best approach is based on short-time energy.
